Fix config key
Fix config key

According to https://github.com/coyove/goflyway/blob/ddfb64fdcb3b69d72754ea24aecdf5a4dce114d9/cmd/goflyway/main.go#L70 , the key of password should be `password` not `key`
coyove/goflyway,coyove/goflyway